Cable testing fixtures, cable testing equipment, and multi-cable life testing methods

Abstract

This invention relates to the technical field of components for stress testing equipment, and discloses a cable testing fixture, a cable testing device, and a method for testing the lifespan of multiple cables. This invention can effectively clamp the main cable and the branch cables formed by the branching of the main cable using a main cable clamp and various branch clamps respectively. Furthermore, under the action of guide pulleys, it avoids changes in the direction of tension on the main cable caused by the need for stable fixation of the main cable clamp. This effectively ensures that the cable testing fixture can stably simulate the installation effect of cables during normal use and stably simulate the tensile force on cables during normal use, thereby ensuring the accuracy and precision of the cable testing simulation at the clamping end.

Description

Technical Field

[0001] This invention relates to the technical field of components for stress testing equipment, specifically to cable testing fixtures, cable testing equipment, and multi-cable life testing methods. Background Technology

[0002] In high-end equipment fields such as medical devices, industrial robots, and aerospace, cable assemblies serve as the core carriers of energy transmission and signal interaction, and their reliability directly affects the operational safety and service life of the entire equipment. Taking a medical bed as an example, its electric lifting and position adjustment modules typically integrate dozens of power cables and signal cables. These cables need to undergo multi-degree-of-freedom motion (including complex deformations such as torsion, bending, and tension) with the robotic arm during equipment operation. Actual operating condition statistics show that approximately 68% of electrical faults in medical equipment originate from cable fatigue damage, with typical failure modes such as joint contact failure, insulation layer rupture, and conductor breakage accounting for over 90%.

[0003] However, traditional testing methods have significant shortcomings in simulating real-world working conditions, mapping damage mechanisms, and testing efficiency, making it difficult to meet the stringent requirements of modern equipment in terms of product reliability verification and lifespan prediction accuracy. Traditional single-factor fatigue testing equipment typically employs simplified mechanical loading modes, such as subjecting a single cable to periodic torsion at a fixed angle and assessing durability by recording the number of fracture cycles. Furthermore, existing standard testing procedures do not adequately consider the synergistic effects of wire harness assemblies. When multiple cables are arranged in parallel, frictional heat accumulation and electromagnetic interference can trigger additional aging effects, the impact of which on lifespan cannot be fully reflected in individual cable tests. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a cable testing fixture, a cable testing device, and a method for testing the lifespan of multiple cables.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A cable testing fixture includes a main cable fixture and branch cable fixtures. Each branch cable fixture includes a connecting plate and several branch clamps. Each branch clamp is slidably disposed on the side of the connecting plate near the main cable fixture, and the distance between the central axis of each branch clamp and the connecting plate can be adjusted independently. The main cable fixture is used to hold the main cable. A guide pulley is provided on one side of the main cable fixture. After the main cable extends out of the main cable fixture, it can first pass around the guide pulley, and each branch cable formed by the branching of the main cable can be clamped in the respective branch clamp. The main cable fixture and the connecting plate can be installed at designated positions on the cable testing equipment, and the positional relationship between the main cable fixture and the connecting plate can be adjusted according to the testing process of the cable testing equipment.

[0007] Preferably, the branch clamp includes a clamp housing and a mounting rod. The connecting plate has several sliding grooves, and each sliding groove has a locking groove on both sides. The bottom of the locking groove has several locking holes. The mounting rod is slidably installed inside the sliding groove and can rotate inside the sliding groove. A locking telescopic connecting rod is provided through the center of the mounting rod, and telescopic locking pins are provided at both ends of the locking telescopic connecting rod. The telescopic locking pins can extend into any one of the locking holes inside the corresponding sliding groove. The angle between the clamp housing and the center plane of the sliding groove can be adjusted by adjusting the position between two telescopic locking pins.

[0008] Preferably, two clamping claws are slidably disposed inside the clamp housing, and a spacing adjustment slider is provided at the top of the two clamping claws. The end of the spacing adjustment slider near the two clamping claws is respectively embedded inside the two clamping claws. A spacing adjustment rod is rotatably connected to the top of the clamp housing, and a gear meshes between the spacing adjustment rod and the top of the spacing adjustment slider. By rotating the spacing adjustment rod, the spacing adjustment slider can be driven to rise and fall, and the spacing between the two clamping claws can be adjusted simultaneously.

[0009] Preferably, the main cable clamp includes several main cable clamp groups, each main cable clamp group has a clamping direction, and each main cable clamp group clamps the main cable in the corresponding clamping direction. The included angle between the clamping directions of two adjacent main cable clamp groups is not less than 30°. Each main cable clamp group includes a clamp connecting plate and two symmetrically arranged connecting supports. The clamp connecting plate and the connecting supports are slidably connected. An eccentric clamping rod is provided on one side of the connecting support. The two connecting supports can synchronously approach and move away from the middle position of the clamp connecting plate, and the two eccentric clamping rods can synchronously rotate to adjust the minimum distance between the two eccentric clamping rods.

[0010] Preferably, the clamp connecting plate has a limiting track at its top, a limiting support at its center, and a distance adjusting screw rotatably mounted inside the limiting support. The bottom ends of both connecting supports are engaged with the limiting track, and the two connecting supports are respectively positioned on either side of the limiting support, with equal distances between them. The distance adjusting screw is threaded to both connecting supports at both ends, with the threads at both ends in opposite directions. A distance adjusting handle is provided at both ends of the distance adjusting screw; rotating the handle drives the screw to rotate, simultaneously causing the two connecting supports to move closer to and further away from the limiting support.

[0011] Preferably, a connecting support plate is provided on one side of the connecting support, and a driving connecting rod is eccentrically provided at one end of the eccentric clamp rod near the connecting support, and the driving connecting rod is rotatably connected to the connecting support plate; an angle adjusting toothed plate is slidably provided at the top of the connecting support, and an angle adjusting gear is provided at one end of the driving connecting rod away from the eccentric clamp rod, and the angle adjusting toothed plate and the angle adjusting gear are meshed.

[0012] Preferably, the main cable clamp assembly further includes an angle adjusting screw, which passes through both of the connecting supports. The angle adjusting screw includes a central telescopic section, two threaded sections, and an angle adjusting handle. The two threaded sections are respectively disposed at both ends of the central telescopic section, and the degree of extension and retraction of the central telescopic section can be adjusted according to the distance between the two connecting supports. A drive slider is fixedly disposed on one side of the angle adjusting tooth plate, and the drive slider is threadedly engaged with the threaded sections. The thread directions of the two threaded sections are opposite. The angle adjusting handle can drive the two angle adjusting tooth plates to move closer and further away synchronously, and drive the distance between the two eccentric clamps to be adjusted.

[0013] A cable testing device, using the aforementioned cable testing clamp to hold cables, is characterized by comprising: a testing frame, a testing base plate at the bottom of the testing frame, and a main cable clamp fixed to the top of the testing base plate; a testing track at the top of the testing frame, a testing top plate slidably disposed inside the testing track, and a torque output mechanism mounted on the top of the testing top plate; the torque output mechanism includes a torque output motor and a torque amplification component; a mounting chuck at the bottom of the testing top plate, the mounting chuck being rotatably connected to a connecting disc, and the torque amplification component capable of driving the connecting disc and the mounting chuck to rotate in a staggered manner.

[0014] Preferably, the bottom of the mounting chuck is provided with a misalignment angle sensor and an offset count sensor, and the top of the detection frame is also provided with a processing terminal. The misalignment angle sensor can measure the maximum misalignment angle between the connecting plate and the mounting chuck in each rotation, the offset count sensor can measure the number of misalignments between the connecting plate and the mounting chuck, and the processing terminal can measure the number of misalignments and the maximum misalignment angle in each rotation to evaluate the condition of the cable.

[0015] The multi-cable life testing method uses the aforementioned cable testing equipment to simultaneously test the life of multiple cables, and includes the following steps:

[0016] The main cable is clamped inside the main cable clamp, and after the end of the main cable extending out of the main cable clamp passes around the guide pulley, the branch cables formed by the branching of the main cable are clamped inside the branch clamps respectively.

[0017] By adjusting the position of the detection top plate, the main cable is kept taut;

[0018] The torque output motor drives the misaligned rotation between the connecting plate and the mounting chuck through a torque amplification component.

[0019] The processing terminal can measure the number of misalignments and the maximum misalignment angle for each rotation, assess the condition of the cable, and obtain the cable's fatigue life.

[0020] Compared with the prior art, the present invention provides a cable testing fixture, a cable testing device, and a method for testing the lifespan of multiple cables, which has the following advantages:

[0021] 1. This cable testing fixture clamps the main cable inside the main cable clamp, and after the end of the main cable extending out of the main cable clamp passes over the guide pulley, clamps the branch cables formed by the branch cable into the branch clamps respectively. This allows for effective clamping of the main cable and the branch cables formed by the branch cable through the main cable clamp and the individual branch clamps. Under the action of the guide pulley, the change in the direction of tension on the main cable caused by the need for stable fixation of the main cable clamp is avoided. This effectively ensures that this type of cable testing fixture can stably simulate the installation effect of the cable during normal use and stably simulate the tension on the cable during normal use, thereby ensuring the accuracy and precision of the cable testing simulation at the clamping end.

[0022] 2. This cable inspection fixture adjusts the distance between the two clamping claws by moving the distance adjustment lever, which drives the distance adjustment slider to rise and fall. This allows for stable clamping of the branch cables. After clamping, when adjusting the clamps for each branch cable according to its length, the position of the two telescopic locking pins of the branch clamp can be adjusted by embedding them into the locking holes inside the corresponding sliding grooves. This allows for adjustment of the position of the branch clamp within the corresponding sliding groove, as well as the angle between the branch clamp and the center plane of the corresponding sliding groove. By adjusting each branch clamp sequentially, it can match the different lengths of the clamped branch cables and adapt to the relative angles of each branch cable in actual use. This more effectively simulates the installation state of each branch cable in actual use, ensuring accuracy in subsequent cable inspection processes.

[0023] 3. In this cable inspection fixture, each main cable clamp group can synchronously approach and move away from the center position of the clamp connecting plate through two connecting supports. The two eccentric clamp rods can synchronously rotate to adjust the minimum distance between the two eccentric clamp rods, respectively clamping the main cable. Furthermore, the setting of multiple main cable clamp groups can more stably clamp the main cable, preventing the main cable from loosening from the main cable clamp. The setting of guide pulleys can also prevent changes in the direction of tension on the main cable caused by the need for stable fixation of the main cable clamp.

[0024] 4. This cable inspection fixture firstly drives the distance adjustment screw to rotate by rotating the distance adjustment handle, which in turn moves the two connecting supports closer to and further away from the limit support, thus coarsely adjusting the distance between the two connecting supports. Then, the angle adjustment handle drives the two angle adjustment teeth to move closer to and further away, and adjusts the distance between the two eccentric clamping rods. The minimum gap between the two eccentric clamping rods can be adjusted to improve the effectiveness of the cable clamping and ensure the cable inspection effect.

[0025] 5. This cable testing equipment can accurately determine the degree of fatigue damage of the cable harness by simulating the fatigue damage under different working conditions of the cable harness and simulating the braking action in the actual operation of the product. During the test, it can ensure accurate and stable rotation, reduce the influence of other factors on the test results, and the processing terminal can measure the number of misalignments and the maximum misalignment angle of each rotation to evaluate the condition of the cable and obtain the service life of the cable. Attached Figure Description

[0026] Figure 1 This is one of the three-dimensional structural schematic diagrams of the cable testing equipment of the present invention;

[0027] Figure 2This is a second three-dimensional structural schematic diagram of the cable testing equipment of the present invention;

[0028] Figure 3 This is one of the three-dimensional structural schematic diagrams of the cable clamp and torque output mechanism of the present invention;

[0029] Figure 4 This is a second three-dimensional structural schematic diagram of the cable clamp and torque output mechanism of the present invention;

[0030] Figure 5 This is one of the three-dimensional structural schematic diagrams of the branch clamp of the present invention;

[0031] Figure 6 This is a second three-dimensional structural schematic diagram of the branch clamp of the present invention;

[0032] Figure 7 This is one of the three-dimensional structural schematic diagrams of the main cable clamp of the present invention;

[0033] Figure 8 This is the second three-dimensional structural schematic diagram of the main cable clamp of the present invention.

[0034] In the diagram: 1. Main cable clamp; 11. Clamp connecting plate; 111. Limiting rail; 112. Limiting support; 113. Distance adjusting screw; 114. Distance adjusting handle; 12. Connecting support; 121. Connecting support plate; 122. Angle adjusting gear plate; 13. Eccentric clamping rod; 131. Drive connecting rod; 132. Angle adjusting gear; 14. Angle adjusting screw; 141. Central telescopic section; 142. Threaded section; 143. Angle adjusting handle; 2. Support cable clamp; 21. Connecting disc; 211 1. Sliding groove; 212. Locking groove; 213. Locking hole; 22. Branch clamp; 221. Clamp housing; 222. Mounting rod; 223. Locking connecting rod; 224. Telescopic locking column; 225. Clamping claw; 226. Spacing adjustment slider; 227. Spacing adjustment rotating rod; 3. Guide pulley; 4. Detection frame; 41. Detection base plate; 42. Detection track; 43. Detection top plate; 5. Torque output mechanism; 51. Torque output motor; 52. Torque amplification assembly; 53. Mounting chuck. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a cable testing fixture, a cable testing device, and a multi-cable life testing method.

[0037] Example 1:

[0038] Please refer to Figures 1-8 The cable testing fixture includes a main cable clamp 1 and branch cable clamps 2. Each branch cable clamp 2 includes a connecting plate 21 and several branch clamps 22. Each branch clamp 22 is slidably disposed on the side of the connecting plate 21 near the main cable clamp 1, and the distance between the central axis of each branch clamp 22 and the connecting plate 21 can be adjusted independently. The main cable clamp 1 is used to clamp the main cable. A guide pulley 3 is provided on one side of the main cable clamp 1. After the main cable extends out of the main cable clamp 1, it can first pass around the guide pulley 3. Each branch cable formed by the branching of the main cable can be clamped in the respective branch clamp 22. The main cable clamp 1 and the connecting plate 21 can be installed at designated positions of the cable testing equipment, and the positional relationship between the main cable clamp 1 and the connecting plate 21 can be adjusted according to the testing process of the cable testing equipment.

[0039] In use, the main cable can be clamped inside the main cable clamp 1, and one end of the main cable extending out of the main cable clamp 1 can be passed around the guide pulley 3. The branch cables formed by the branching of the main cable can then be clamped inside the branch clamps 22. This allows the main cable and the branch cables formed by the branching of the main cable to be effectively clamped by the main cable clamp 1 and the branch clamps 22 respectively. Under the action of the guide pulley 3, the change in the direction of the tension on the main cable caused by the need for stable fixation of the main cable clamp 1 is avoided. This effectively ensures that this type of cable testing clamp can stably simulate the installation effect of the cable during normal use and can stably simulate the tension on the cable during normal use, thereby ensuring the accuracy and precision of the cable testing simulation at the clamping end.

[0040] Example 2:

[0041] Please refer to Figures 1-8The difference from the above embodiment is that the branch clamp 22 includes a clamp housing 221 and a mounting rod 222. The connecting plate 21 has several sliding grooves 211, and each sliding groove 211 has a locking groove 212 on both sides. The bottom of the locking groove 212 has several locking holes 213. The mounting rod 222 is slidably installed inside the sliding groove 211 and can rotate inside the sliding groove 211. A locking telescopic connecting rod 223 is provided through the center of the mounting rod 222, and telescopic locking pins 224 are provided at both ends of the locking telescopic connecting rod 223. The telescopic locking pins 224 can extend into any one of the locking holes 213 inside the corresponding sliding groove 211. The angle between the clamp housing 221 and the center plane of the sliding groove 211 can be adjusted by adjusting the position between the two telescopic locking pins 224.

[0042] Two gripping jaws 225 are slidably disposed inside the clamp housing 221. A spacing adjustment slider 226 is provided at the top of the two gripping jaws 225. The end of the spacing adjustment slider 226 near the two gripping jaws 225 is respectively embedded inside the two gripping jaws 225. A spacing adjustment rod 227 is rotatably connected to the top of the clamp housing 221. The spacing adjustment rod 227 is engaged with the top of the spacing adjustment slider 226 by gear. By rotating the spacing adjustment rod 227, the spacing adjustment slider 226 can be driven to rise and fall, and at the same time, the spacing between the two gripping jaws 225 can be adjusted.

[0043] In use, by turning the spacing adjustment lever 227, the spacing adjustment slider 226 is driven to rise and fall, and the spacing between the two clamping claws 225 is adjusted. This allows the branch cables to be stably clamped by the two clamping claws 225. After clamping, when it is necessary to adjust each branch clamp 22 according to the length of each branch cable, the position of the two telescopic locking pins 224 of the branch clamp 22 can be adjusted by embedding them into the locking holes 213 inside the corresponding sliding grooves 211. This allows the position of the branch clamp 22 in the corresponding sliding grooves 211 to be adjusted, as well as the angle between the branch clamp 22 and the center plane of the corresponding sliding groove 211. By adjusting each branch clamp 22 in sequence, it is possible to match the different lengths of the clamped branch cables and adapt to the relative angles of each branch cable in actual use. This can more effectively simulate the installation state of each branch cable in actual use and effectively ensure the accuracy in the subsequent cable inspection process.

[0044] Example 3:

[0045] Please refer to Figures 1-8The difference from the above embodiment is that the main cable clamp 1 includes several main cable clamp groups, each main cable clamp group has a clamping direction, and each main cable clamp group clamps the main cable in the corresponding clamping direction. The included angle between the clamping directions of two adjacent main cable clamp groups is not less than 30°. Each main cable clamp group includes a clamp connecting plate 11 and two symmetrically arranged connecting supports 12. The clamp connecting plate 11 and the connecting supports 12 are slidably connected. An eccentric clamping rod 13 is provided on one side of the connecting support 12. The two connecting supports 12 can synchronously approach and move away from the middle position of the clamp connecting plate 11, and the two eccentric clamping rods 13 can synchronously rotate to adjust the minimum distance between the two eccentric clamping rods 13.

[0046] In use, each main cable clamp group can synchronously approach and move away from the middle position of the clamp connecting plate 11 through two connecting supports 12. The two eccentric clamp rods 13 can synchronously rotate to adjust the minimum distance between the two eccentric clamp rods 13, respectively clamping the main cable. With the setting of multiple main cable clamp groups, the main cable can be clamped more stably, avoiding the main cable from loosening between the main cable and the main cable clamp 1. And with the setting of guide pulley 3, the change of the direction of tension on the main cable caused by the need for stable fixation of the main cable clamp 1 is avoided.

[0047] The clamp connecting plate 11 has a limit track 111 at its top, and a limit support 112 at the center of the limit track 111. A distance adjustment screw 113 is rotatably installed inside the limit support 112. The bottom ends of the two connecting supports 12 are engaged with the limit track 111. The two connecting supports 12 are respectively located on both sides of the limit support 112, and the distance between the two connecting supports 12 and the limit support 112 is equal. The two ends of the distance adjustment screw 113 are threaded to the two connecting supports 12 respectively, and the thread directions of the two ends of the distance adjustment screw 113 are opposite. Both ends of the distance adjustment screw 113 are provided with distance adjustment handles 114. By rotating the distance adjustment handles 114, the distance adjustment screw 113 can be driven to rotate, and at the same time, the two connecting supports 12 can be driven to move closer to and further away from the limit support 112.

[0048] A connecting support plate 121 is provided on one side of the connecting support 12. A drive connecting rod 131 is eccentrically provided at the end of the eccentric clamping rod 13 near the connecting support 12. The drive connecting rod 131 is rotatably connected to the connecting support plate 121. An angle adjusting toothed plate 122 is slidably provided at the top of the connecting support 12. An angle adjusting gear 132 is provided at the end of the drive connecting rod 131 away from the eccentric clamping rod 13. The angle adjusting toothed plate 122 and the angle adjusting gear 132 are meshed.

[0049] The main cable clamp assembly also includes an angle adjusting screw 14, which passes through two connecting supports 12. The angle adjusting screw 14 includes a central telescopic section 141, two threaded sections 142, and an angle adjusting handle 143. The two threaded sections 142 are respectively located at both ends of the central telescopic section 141, and the degree of extension and retraction of the central telescopic section 141 can be adjusted according to the distance between the two connecting supports 12. A drive slider 123 is fixedly installed on one side of the angle adjusting toothed plate 122. The drive slider 123 is threadedly engaged with the threaded sections 142. The thread directions of the two threaded sections 142 are opposite. The angle adjusting handle 143 can drive the two angle adjusting toothed plates 122 to move closer and further away synchronously, and drive the distance between the two eccentric clamping rods 13 to be adjusted.

[0050] In use, firstly, rotating the distance adjustment handle 114 drives the distance adjustment screw 113 to rotate, simultaneously causing the two connecting supports 12 to move closer to and further away from the limiting support 112, thus coarsely adjusting the distance between the two connecting supports 12 (the distance between the two eccentric clamping rods 13). Then, the angle adjustment handle 143 drives the two angle adjustment teeth 122 to move closer to and further away, and adjusts the distance between the two eccentric clamping rods 13. The minimum gap between the two eccentric clamping rods 13 can be adjusted. In actual use, the two eccentric clamping rods 13 can be set as elastic elements. The deformation of the elastic elements can improve the effectiveness of clamping the main cable, while avoiding damage to the outer protective layer of the main cable, thus more effectively improving the detection effect of the main cable.

[0051] Example 4:

[0052] Please refer to Figures 1-8 The cable testing equipment uses a cable testing fixture as described in any one of Embodiments 1-3 to clamp the cable. It is characterized by comprising: a testing frame 4, with a testing base plate 41 at the bottom of the frame 4, and a main cable clamp 1 fixed to the top of the testing base plate 41; a testing track 42 at the top of the frame 4, with a testing top plate 43 slidably disposed inside the track 42, and a torque output mechanism 5 mounted on the top of the top plate 43; the torque output mechanism 5 includes a torque output motor 51 and a torque amplification component 52; a mounting chuck 53 at the bottom of the top plate 43, rotatably connected to a connecting plate 21; and the torque amplification component 52 driving the connecting plate 21 to rotate in a staggered manner with the mounting chuck 53.

[0053] The bottom of the mounting chuck 53 is equipped with a misalignment angle sensor and an offset count sensor, and the top of the detection frame 4 is equipped with a processing terminal. The misalignment angle sensor can measure the maximum misalignment angle between the connecting plate 21 and the mounting chuck 53 each time they rotate. The offset count sensor can measure the number of misalignments between the connecting plate 21 and the mounting chuck 53. The processing terminal can measure the number of misalignments and the maximum misalignment angle each time they rotate, and evaluate the condition of the cable.

[0054] In use, the torque amplification component 52 adopts a pulley drive structure to amplify the torque output of the torque output motor 51, giving the connecting disc 21 greater driving force. This more effectively simulates the braking action during actual operation, achieving precise and stable rotation. Furthermore, the bottom of the mounting chuck 53 is equipped with an origin sensing sensor. By allowing the product to be tested to be placed arbitrarily, high precision requirements for placement and parking are not necessary. The rotation origin of the connecting disc 21 can be determined before testing begins, avoiding detection errors from the misalignment angle sensor and offset count sensor. The processing terminal can measure the number of misalignments and the maximum misalignment angle per rotation to assess the cable's condition and determine its lifespan. This cable testing equipment can accurately determine the degree of fatigue damage of the wire harness by simulating fatigue damage under different working conditions and simulating braking actions during actual product operation. The testing process ensures precise and stable rotation, reducing the impact of other factors on the test results.

[0055] Example 5:

[0056] The multi-cable life testing method uses the cable testing equipment described in Example 4 to simultaneously test the life of multiple cables, and includes the following steps:

[0057] The main cable is clamped inside the main cable clamp 1, and after the end of the main cable extending out of the main cable clamp 1 passes around the guide pulley 3, the branch cables formed by the branching of the main cable are clamped inside the branch clamp 22 respectively.

[0058] By adjusting the position of the detection top plate 43, the main cable is brought into a taut state;

[0059] The torque output motor 51 drives the connecting plate 21 and the mounting chuck 53 to rotate in a misaligned manner through the torque amplification component 52.

[0060] The processing terminal can measure the number of misalignments and the maximum misalignment angle for each rotation, assess the condition of the cable, and obtain the cable's fatigue life.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cable testing fixture, comprising a main cable fixture and branch cable fixtures, each branch cable fixture comprising a connecting disc and a plurality of branch fixtures, characterized in that: Each of the branch clamps is slidably disposed on the side of the connecting plate near the main cable clamp, and the distance between the central axis of each branch clamp and the connecting plate can be adjusted independently; The main cable clamp is used to hold the main cable. A guide pulley is provided on one side of the main cable clamp. After the main cable extends out of the main cable clamp, it can first pass around the guide pulley. Each branch cable formed by the branching of the main cable can be clamped in the interior of each branch clamp. The main cable clamp and the connecting plate can be installed at designated positions on the cable testing equipment, and the positional relationship between the main cable clamp and the connecting plate can be adjusted as the testing process of the cable testing equipment progresses.

2. The cable testing fixture according to claim 1, characterized in that: The branch clamp includes a clamp housing and a mounting rod. The connecting plate has several sliding grooves, and each sliding groove has a locking groove on both sides. The bottom of the locking groove has several locking holes. The mounting rod is slidably installed inside the sliding groove, and the mounting rod can rotate inside the sliding groove. A locking telescopic connecting rod is provided through the center of the mounting rod, and telescopic locking posts are respectively provided at both ends of the locking telescopic connecting rod. The telescopic locking pin can extend into any one of the locking holes inside the corresponding sliding groove. The angle between the clamp housing and the center plane of the sliding groove can be adjusted by adjusting the position between the two telescopic locking pins.

3. The cable testing fixture according to claim 2, characterized in that: Two clamping claws are slidably disposed inside the clamp housing. A spacing adjustment slider is provided at the top of the two clamping claws. The end of the spacing adjustment slider near the two clamping claws is respectively embedded in the two clamping claws. A spacing adjustment rod is rotatably connected to the top of the clamp housing. A gear meshes between the spacing adjustment rod and the top of the spacing adjustment slider. Rotating the spacing adjustment lever can drive the spacing adjustment slider to rise and fall, and at the same time drive the spacing between the two clamping claws to adjust.

4. The cable testing fixture according to claim 1, characterized in that: The main cable clamp includes several main cable clamp groups, each main cable clamp group has a clamping direction, each main cable clamp group clamps the main cable in the corresponding clamping direction, and the included angle between the clamping directions of two adjacent main cable clamp groups is not less than 30°. Each main cable clamp assembly includes a clamp connecting plate and two symmetrically arranged connecting supports. The clamp connecting plate and the connecting supports are slidably connected, and an eccentric clamping rod is provided on one side of the connecting support. The two connecting supports can synchronously approach and move away from the center position of the clamp connecting plate, and the two eccentric clamp rods can synchronously rotate to adjust the minimum distance between the two eccentric clamp rods.

5. The cable testing fixture according to claim 4, characterized in that: The top of the clamp connecting plate is provided with a limiting rail, the center of the limiting rail is provided with a limiting support, and a distance adjustment screw is rotatably provided inside the limiting support; The bottom ends of both connecting supports are fitted with the limiting rail. The two connecting supports are respectively disposed on both sides of the limiting support, and the distance between the two connecting supports and the limiting support is equal. The two ends of the distance adjusting screw are respectively threaded to the two connecting supports, and the thread directions at the two ends of the distance adjusting screw are opposite. Both ends of the distance adjustment screw are provided with distance adjustment handles. By rotating the distance adjustment handles, the distance adjustment screw can be driven to rotate, and at the same time, the two connecting supports can be driven to move closer to and further away from the limiting support.

6. The cable testing fixture according to claim 5, characterized in that: A connecting support plate is provided on one side of the connecting support, and a driving link is eccentrically provided at one end of the eccentric clamp rod near the connecting support. The driving link is rotatably connected to the connecting support plate. An angle adjustment toothed plate is slidably provided at the top of the connecting support, and an angle adjustment gear is provided at the end of the driving connecting rod away from the eccentric clamp rod. The angle adjustment toothed plate and the angle adjustment gear are meshed.

7. The cable testing fixture according to claim 6, characterized in that: The main cable clamp assembly also includes an angle adjusting screw, which passes through the two connecting supports respectively. The angle adjusting screw includes a central telescopic section, two threaded sections, and an angle adjusting handle. The two threaded sections are respectively disposed at both ends of the central telescopic section, and the degree of telescopic extension of the central telescopic section can be adjusted according to the distance between the two connecting supports; A drive slider is fixedly installed on one side of the angle adjustment tooth plate. The drive slider is threadedly engaged with the threaded section. The thread directions of the two threaded sections are opposite. The angle adjustment handle can drive the two angle adjustment tooth plates to move closer and further away synchronously, and drive the distance between the two eccentric clamps to be adjusted.

8. A cable testing device, comprising using a cable testing clamp as described in any one of claims 1-7 to clamp the cable, characterized in that, include: A testing frame, wherein a testing base plate is provided at the bottom of the testing frame, and the main cable clamp is fixed to the top of the testing base plate; The top of the testing frame is provided with a testing track, and a testing top plate is slidably arranged inside the testing track. A torque output mechanism is installed on the top of the testing top plate. The torque output mechanism includes a torque output motor and a torque amplification component. A mounting chuck is provided at the bottom end of the detection top plate. The mounting chuck is rotatably connected to the connecting plate. The torque amplification component can drive the connecting plate and the mounting chuck to rotate in a staggered manner.

9. The cable testing equipment according to claim 8, characterized in that: The bottom of the mounting chuck is equipped with a misalignment angle sensor and an offset count sensor, and the top of the detection frame is equipped with a processing terminal. The misalignment angle sensor can measure the maximum misalignment angle between the connecting plate and the mounting chuck in each rotation, the offset count sensor can measure the number of misalignments between the connecting plate and the mounting chuck, and the processing terminal can measure the number of misalignments and the maximum misalignment angle in each rotation to evaluate the condition of the cable.

10. A method for detecting the lifespan of multiple cables, characterized in that, The method of simultaneously performing life testing on multiple cables using the cable testing equipment as described in any one of claims 8-9 includes the following steps: The main cable is clamped inside the main cable clamp, and after the end of the main cable extending out of the main cable clamp passes around the guide pulley, the branch cables formed by the branching of the main cable are clamped inside the branch clamps respectively. By adjusting the position of the detection top plate, the main cable is kept taut; The torque output motor drives the misaligned rotation between the connecting plate and the mounting chuck through a torque amplification component. The processing terminal can measure the number of misalignments and the maximum misalignment angle for each rotation, assess the condition of the cable, and obtain the cable's fatigue life.

Images